package utils;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

/**
 * 这是个配置文件操作类，用来读取和设置ini配置文件
 * @author 何镇镇
 */
public final class ConfigFile {
	/**
	 * 从ini配置文件中读取变量的值
	 * 
	 * @param file
	 *            配置文件的路径
	 * @param variable
	 *            要获取的变量名称
	 * @param defaultValue
	 *            变量名称不存在时的默认值
	 * @return 变量的值
	 * @throws IOException
	 *             抛出文件操作可能出现的io异常
	 */
	public static String getProfileString(String file, 
			String variable, String defaultValue) throws IOException {
		String strLine, value = "";
		BufferedReader bufferedReader = new BufferedReader(new FileReader(file));

		try {
			while ((strLine = bufferedReader.readLine()) != null) {				 

				strLine = strLine.trim();
				String[] strArray = strLine.split("=");
				if (strArray.length == 1) {
					value = strArray[0].trim();
					if (value.equalsIgnoreCase(variable)) {
						value = "";
						return value;
					}
				} else if (strArray.length == 2) {
					value = strArray[0].trim();
					if (value.equalsIgnoreCase(variable)) {
						value = strArray[1].trim();
						return value;
					}
				} else if (strArray.length > 2) {
					value = strArray[0].trim();
					if (value.equalsIgnoreCase(variable)) {
						value = strLine.substring(strLine.indexOf("=") + 1)
								.trim();
						return value;
					}
				}

			}
		} finally {
			bufferedReader.close();
		}
		return defaultValue;
	}

	/**
	 * 修改ini配置文件中变量的值
	 * 
	 * @param file
	 *            配置文件的路径
	 * @param variable
	 *            要修改的变量名称
	 * @param value
	 *            变量的新值
	 * @throws IOException
	 *             抛出文件操作可能出现的io异常
	 */
	public static boolean setProfileString(String file,
			String variable, String value) throws IOException {
		String fileContent,  strLine, newLine;
		String getValue;
		BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
		
		fileContent = "";
		try {

			while ((strLine = bufferedReader.readLine()) != null) {		
					strLine = strLine.trim();
					String[] strArray = strLine.split("=");
					getValue = strArray[0].trim();
					if (getValue.equalsIgnoreCase(variable)) {
						newLine = getValue + " = " + value + " " ;
						fileContent += newLine + "\r\n";
						while ((strLine = bufferedReader.readLine()) != null) {
							fileContent += strLine + "\r\n";
						}
						bufferedReader.close();
						BufferedWriter bufferedWriter = new BufferedWriter(
								new FileWriter(file, false));
						bufferedWriter.write(fileContent);
						bufferedWriter.flush();
						bufferedWriter.close();
						return true;
					}			
				fileContent += strLine + "\r\n";
			}
		} catch (IOException ex) {
			throw ex;
		} finally {
			bufferedReader.close();
		}
		return false;
	}

	/**
	 * 程序测试
	 
	public static void main(String[] args) {
		// String value = Config.getProfileString("sysconfig.ini", "Option",
		// "OracleDB", "default");
		// log.debug(value);
		try {
			log.debug(ConfigFile
					.getProfileString("C:/ICCom.ini","ProgType", "1112"));
		} catch (IOException e) {
			log.debug(e.toString());
		}

	}
	*/
}